<template>
  <header class="header">
    <h1>todos</h1>
    <input id="toggle-all" class="toggle-all" type="checkbox" v-model="sun" />
    <label for="toggle-all"></label>
    <input
      @keyup.enter="add"
      v-model.trim="conment"
      class="new-todo"
      placeholder="输入任务名称-回车确认"
      autofocus
    />
  </header>
</template>

<script>
export default {
  data() {
    return {
      conment: "",
    };
  },
  props: ["arr"],
  methods: {
    add() {
      if (this.conment.trim() === "") {
        return alert("请输入内容！");
      }
      this.arr.push({
        id: +new Date(),
        name: this.conment,
        isDone: false,
      });
      this.conment = "";
    },
  },
  computed: {
    sun: {
      get() {
				if(this.arr.length === 0){
					return 
				}
        return this.arr.every((item) => item.isDone);
      },
      set(val) {
        this.arr.forEach((item) => item.isDone = val);
      },
    },
  },
};
</script>
